ArraysLesson 8Free preview

DSA Quick Sort

This lesson is part of DSA · All levels

Summary

Quick sort selects an element as a pivot, then divides the list into two parts: the smaller element of the pivot and the larger or equal element. The pivot is then placed in the final position and the process continues recursively on both sides. The average complexity is fast, but the worst case can be P1 when the partition is always unbalanced.

Key points

Strategy of divide and conquer by partitioning
The choice of pivot influences performance, such as the middle or random element
Average O(n log n), worst O(n^2) on an unbalanced partition
In-place with recursion on both sides of the partition

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